Smoke-consuming furnace



(No Modei.) 2 Sheets-Sheet 1.

J. H. CROSBY.

SMOKE GONSUMING FURNACE.

No. 571,752. Patented Nov. 24, 1896.

WITNEI SEES. lm/ENT my ATTY (No'ModeL) 2 Sheets8heet 2.

J. H. CROSBY. SMOKE consume FURNACE.

No. 571,752. Patented Nov. 24, 1896.

WITNEEIEEE. \NVENTEJR UNITED STATES PATENT OEric JAMES H. CROSBY, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO BENJAMIN S. AGNEIV, OF BOSTON, MASSAGHUSETTIS.

SMOKE- OONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 571,752, dated November 24, 1896.

Application filed July 29, 1896. Serial No. 600,948. (No modem To coZZ whom it may concern.-

Be it known that I, JAMES H. CROSBY, of Somerville, in the county of Middlesex and State of Massachusetts, have invented an In1- proveinent in Smoke-Consuming Furnaces, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to smoke-consuining apparatus of that class which supply air and steam to the fire-box or combustion-chamber of a furnace to promote the combustion of the smoke and finer particles of carbon therein.

Prior to this invention I am aware that steam has been supplied to the fire-box in fine streams by causing the steam to pass through substantially small orifices in a device commonly called a nozzle, which is inaccessible from the outside of the furnace aft-er once placed in position, and which in practice becomes clogged up and practically inoperative after little use.

My present invention relates more particularly to a nozzle for the passage of the steam into the air-admission pipe, which nozzle is provided with a discharge mouth or port controlled by a valve which is capable of being operated from the outside of the furnace after the apparatus has been set up in its operative position. The air-ad mission pipe is connected, as will be described, to a deflector embedded in the brickwork of the furnace and of a novel construction, as will be described, which serves to keep the deflector in its proper position while the furnace-wall is being built up and thereafter. These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 represents in side elevation, partially broken away, a sufficient portion of a smoke consumingfurnace embodying this invention; Fig. 2, a detail in perspective of the deflector; Fig. 3, a sectional detail, on an enlarged scale, of the air-admission pipe and steam-nozzle, the latter being turned into a position substantially at right angles to that shown in Fig. 1.

Referring to Fig. 1, A represents the front wall of a furnace A, which maybe of any suitable or desired construction, and A a boiler supported above the fire-box or COillbustionchamber A of the said furnace. The furnace A is provided with devices for promoting the combustion of smoke and the finer particles of carbon, and the said devices are constructed in a manner as will be described.

Referring to Fig. 3, 3 represents an airsupply pipe comprising the substantially long leg or arm a and a substantially short leg or arm a, into which extends a nozzle B, coniprising,essentially, a pi pc or tube a provided at its rear portion with an enlargement a having screw-threads oi which engage screwthreads on the interior of a hollow extension a of the arm (1,, which hollow extension supports the nozzle within the pipe 13. lhe pipe or tube a is provided with an annular flange a", adapted to be seated against the end of the extension a and at its front end the tube or pipe (z- 'is preferably provided with an enlarged head a provided with preferably a contracted mouth or outlet-port, with which cooperates a conical. or tapering valve a having its stem (0 extended back through the nozzle or tube a to the outside of the same, so that its projecting end 2 is accessible from outside the furnace when the apparatus is set up in its operative position, as shown in Fig. 1. The valve-stein a is supported at or near its opposite ends, as herein shown, by means of a bridge or cross-piece Z) in the head 0 which is provided with a screw-threaded opening adapted to be engaged by screwthreads Z) on the valve-stein, the rear end of the valvestem being extended through a hollow pro jection b provided with a threaded socket b into which enters a threaded hollow nut or plug 1)", through which the valve-stein extends the socket I) being designed to receive suitable packing material b with which the valve-stem may be packed steam-tight.

The nozzle or tube a is provided with a bend or arm I), constituting the steam-inlet for the nozzle or tube, to which may be con- 9 5 nected a steam-supply pipe 11 (see Fig. 1,)

- wall A of the same, whereby the valve-stem a is located in a convenient position for the engineer or other person running the furnace.

The pipe 13 is preferably attached to a deflector pipe or casting B preferably of the construction shown in Fig. 2, it consisting of a substantially tubular rear portion 0 and a tapering substantially flattened front portion 0, the tubular rear portion 0 having substantially flat top and bottom plates or surfaces.

0 c to facilitate the building up of the furnace-wall, and the connection to it of the airpipe B without danger of turning or otherwise deranging the deflector when once set in position.

will be connected to the deflector by means of a con flin -sleeve c ada ted to have its front end inserted into the tubular section 0 of the deflector and secured therein by setscrews 0, extended through substantially diametrically opposite sidesof the section 0, the rear end of the coupling-sleeve 0 having a flange 0 adapted to be engaged by a flange c on a collar or ring 0, screw-threaded on its interior to engage the screw-threaded end of the arm a of the pipe 15, as shown in Fig.

The air-pipe B may and preferably will be provided with means for regulating the supply of air, and in the present instance the pipe B is provided at the end. of the arm a with internal screw-threads-cl, which are engaged by a threaded ring (1, connected to a cap (1 by a series of arms (Z forming between them air-admission ports or spaces (1", the said cap being provided, as shown, with an air port or opening (Z'.

By reference to Fig. 3 it will be seen that the steam-nozzle may be turned so as to enable it to be easily'and quickly connected to the steam-supply pipe I), and thereby enable the said pipe to be placed in the most convenient or desired position with relation to the appurtenances on the front of the boiler. Furthermore, it will be seen that the amount of steam supplied to the fire-box may be con: trolled at the will of the operator while the apparatus is in operation, thereby avoiding the necessity of shutting off the supply of steam to the furnace in order to remove the steam-nozzle and clean the same. So, also, it will be seen that the valve a may be opened wide to admit of a large quantity of steam, which will flush out or clean the nozzle from deposits or foreign matter and thereby pre vent clogging up of the discharge-port of the nozzle. Furthermore, it will be seen that the amount of steam supplied fromthe boiler to the nozzle need not be reduced by a valve in the supply-pipe Z)", as now commonly practiced, which reduces the pressure at the-discharge-mouth of nozzles as now constructed The air-pipe B may and preferably and known to me, but the full boiler-pressure can be maintained up to the mouth of the nozzle and the quantity of steam reduced at that point. The amount of air supplied to the boiler may be governed by regulating the cap d I have herein described the nozzle B as steam-nozzle, but I do not desire to limit my invention in this respect, as the said nozzle maybe used to advantage for supplying natural or other gas to a fire-box.

I claim- 1. The combination with a furnace, of an air-admission pipe B composed of the legs or arms a a, means to connect the arm a with the fire-box of the furnace, a steam-admission pipe or nozzle provided at one end with an outlet port or mouth and at its opposite end with a bend 6 forming the inlet for said nozzle, and having anextension b in line with the outlet-mouth, the said nozzle having screw-threadso to engage a.,screw-threaded openin gin the arm a and also having a flange a to abut against the arm a, and a conical valve cooperatingwith the outlet-mouth of the steam-nozzle and having a stem extended back through the nozzle. and through the ex tension 12 of the same, substantially as described.

2. The combination with afurnaee, of an air-admission pipe 13 composed of the legs or arms a ct, the arm CL having internal screwthreadsd, a steam pipe or nozzle extended into the arm a and provided with a discharge port or mouth within the arm a and with a bend b outside of the'arm a constituting an inlet for said nozzle, which is detachably secured to said arm a, a valve cooperating with said discharge port or mouth and provided with a stem extended back through the said nozzle, and a cap (F, a. threaded ring d engaging the screw-threads (Z and a series of arms connecting said cap and ring to form air-admission spaces (7 substantially as described.

The combination of the following instrumentalities, an air-admission pipe, a deflector provided with an inclined front section 0' and a tubular rear section 0 having top and bottom substantially flat surfaces, a coupling-sleeve 0 extended. into the tubular section 0 of the deflector, means to secure said sleeve in said deflector, a ring 0 coupling the sleeve 0 to the air-admission pipe, and a steam-supply pipe or nozzle extended into the said air-pipe and provided with a valve accessible fromvtheoutside of the air-pipe, substantially. as described.

at. The nozzle B consisting of a pipe or tube a provided with an. enlarged head a having a contracted discharge port or mouth at one end and having an inlet-port at or near its opposite end at an angle to the dischargemouth, abridge b inthehead (0 having a screw-threaded opening, avalve cooperating with the discharge-mouth and provided with a stem extended back through the opening name to this specification in the presence of in the said bridge and through the end well two subscribing Witnesses. of the said pipe beyond the inlet-port and q 7 1 s v 7' provided with screw-threads at its front end JAMED Obl) 5 to engage the screw-threaded opening in the Vitnesses:

bridge I), substantially as described. JAS. H. CHURCHILL,

In testimony whereof I have signed my J. MURPHY. 

